./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:35:55,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:35:55,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:35:55,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:35:55,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:35:55,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:35:55,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:35:55,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:35:55,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:35:55,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:35:55,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:35:55,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:35:55,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:35:55,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:35:55,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:35:55,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:35:55,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:35:55,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:35:55,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:35:55,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:35:55,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:35:55,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:35:55,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:35:55,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:35:55,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:35:55,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:35:55,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:35:55,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:35:55,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:35:55,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:35:55,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:35:55,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:35:55,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:35:55,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:35:55,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:35:55,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:35:55,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:35:55,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:35:55,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:35:55,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:35:55,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:35:55,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:35:55,512 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:35:55,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:35:55,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:35:55,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:35:55,514 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:35:55,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:35:55,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:35:55,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:35:55,516 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:35:55,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:35:55,516 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:35:55,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:35:55,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:35:55,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:35:55,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:35:55,517 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:35:55,517 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:35:55,517 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:35:55,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:35:55,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:35:55,518 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:35:55,518 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:35:55,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:35:55,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:35:55,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:35:55,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:35:55,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:35:55,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:35:55,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:35:55,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:35:55,519 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:35:55,520 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:35:55,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:35:55,520 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:35:55,520 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:35:55,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:35:55,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:35:55,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:35:55,895 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:35:55,895 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:35:55,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-08-29 21:35:57,037 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:35:57,268 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:35:57,269 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-08-29 21:35:57,300 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d44b352e5/2a69c55272884688b15050da971d6880/FLAG01b1cb605 [2023-08-29 21:35:57,317 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d44b352e5/2a69c55272884688b15050da971d6880 [2023-08-29 21:35:57,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:35:57,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:35:57,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:35:57,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:35:57,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:35:57,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5978dc17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57, skipping insertion in model container [2023-08-29 21:35:57,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:35:57,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:35:57,564 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2023-08-29 21:35:57,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:35:57,600 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:35:57,628 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2023-08-29 21:35:57,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:35:57,685 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:35:57,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57 WrapperNode [2023-08-29 21:35:57,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:35:57,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:35:57,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:35:57,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:35:57,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,714 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2023-08-29 21:35:57,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:35:57,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:35:57,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:35:57,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:35:57,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,734 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:35:57,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:35:57,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:35:57,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:35:57,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (1/1) ... [2023-08-29 21:35:57,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:35:57,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:35:57,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:35:57,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:35:57,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:35:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:35:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:35:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:35:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:35:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:35:57,799 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:35:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:35:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:35:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:35:57,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:35:57,801 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:35:57,880 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:35:57,881 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:35:58,066 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:35:58,071 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:35:58,071 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-29 21:35:58,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:35:58 BoogieIcfgContainer [2023-08-29 21:35:58,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:35:58,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:35:58,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:35:58,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:35:58,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:35:57" (1/3) ... [2023-08-29 21:35:58,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff4200c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:35:58, skipping insertion in model container [2023-08-29 21:35:58,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:35:57" (2/3) ... [2023-08-29 21:35:58,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff4200c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:35:58, skipping insertion in model container [2023-08-29 21:35:58,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:35:58" (3/3) ... [2023-08-29 21:35:58,079 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2023-08-29 21:35:58,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:35:58,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:35:58,091 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:35:58,146 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:35:58,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2023-08-29 21:35:58,243 INFO L130 PetriNetUnfolder]: 17/154 cut-off events. [2023-08-29 21:35:58,244 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:35:58,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 154 events. 17/154 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 377 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-29 21:35:58,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 236 flow [2023-08-29 21:35:58,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 114 transitions, 236 flow [2023-08-29 21:35:58,255 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:35:58,272 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 114 transitions, 236 flow [2023-08-29 21:35:58,277 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 114 transitions, 236 flow [2023-08-29 21:35:58,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2023-08-29 21:35:58,300 INFO L130 PetriNetUnfolder]: 17/154 cut-off events. [2023-08-29 21:35:58,304 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:35:58,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 154 events. 17/154 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 377 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-29 21:35:58,307 INFO L119 LiptonReduction]: Number of co-enabled transitions 2576 [2023-08-29 21:36:01,004 INFO L134 LiptonReduction]: Checked pairs total: 5138 [2023-08-29 21:36:01,005 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-29 21:36:01,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:01,021 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cb2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:01,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:01,025 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:36:01,025 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:01,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:01,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:01,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:01,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:01,030 INFO L85 PathProgramCache]: Analyzing trace with hash 13992, now seen corresponding path program 1 times [2023-08-29 21:36:01,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:01,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903770079] [2023-08-29 21:36:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:01,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:01,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903770079] [2023-08-29 21:36:01,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903770079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:01,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:01,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:01,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376434048] [2023-08-29 21:36:01,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:01,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:01,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:01,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 212 [2023-08-29 21:36:01,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:01,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 212 [2023-08-29 21:36:01,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:01,352 INFO L130 PetriNetUnfolder]: 113/267 cut-off events. [2023-08-29 21:36:01,352 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:01,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 267 events. 113/267 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1086 event pairs, 96 based on Foata normal form. 25/221 useless extension candidates. Maximal degree in co-relation 493. Up to 227 conditions per place. [2023-08-29 21:36:01,354 INFO L137 encePairwiseOnDemand]: 198/212 looper letters, 30 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2023-08-29 21:36:01,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 148 flow [2023-08-29 21:36:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-29 21:36:01,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2023-08-29 21:36:01,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-29 21:36:01,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-29 21:36:01,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:01,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-29 21:36:01,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,373 INFO L175 Difference]: Start difference. First operand has 32 places, 39 transitions, 86 flow. Second operand 3 states and 327 transitions. [2023-08-29 21:36:01,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 148 flow [2023-08-29 21:36:01,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:01,376 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 60 flow [2023-08-29 21:36:01,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-29 21:36:01,379 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-29 21:36:01,379 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 60 flow [2023-08-29 21:36:01,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:01,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:01,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:36:01,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:01,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash 13990, now seen corresponding path program 1 times [2023-08-29 21:36:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:01,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127442297] [2023-08-29 21:36:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:01,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:01,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:01,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127442297] [2023-08-29 21:36:01,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127442297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:01,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:01,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:01,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542694648] [2023-08-29 21:36:01,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:01,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:01,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:01,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-08-29 21:36:01,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:01,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-08-29 21:36:01,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:01,548 INFO L130 PetriNetUnfolder]: 96/221 cut-off events. [2023-08-29 21:36:01,548 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-29 21:36:01,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 221 events. 96/221 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 760 event pairs, 77 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 434. Up to 210 conditions per place. [2023-08-29 21:36:01,549 INFO L137 encePairwiseOnDemand]: 208/212 looper letters, 30 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-08-29 21:36:01,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 144 flow [2023-08-29 21:36:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-29 21:36:01,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2023-08-29 21:36:01,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-29 21:36:01,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-29 21:36:01,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:01,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-29 21:36:01,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,554 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 60 flow. Second operand 3 states and 320 transitions. [2023-08-29 21:36:01,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 144 flow [2023-08-29 21:36:01,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 138 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:01,555 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 64 flow [2023-08-29 21:36:01,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-29 21:36:01,556 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-29 21:36:01,556 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 64 flow [2023-08-29 21:36:01,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:01,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:36:01,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:36:01,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:01,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 417115487, now seen corresponding path program 1 times [2023-08-29 21:36:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:01,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684218569] [2023-08-29 21:36:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:01,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:01,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:01,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684218569] [2023-08-29 21:36:01,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684218569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:01,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321393039] [2023-08-29 21:36:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:01,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:01,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:36:01,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:36:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:01,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:36:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:01,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:36:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:01,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:01,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321393039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:01,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:01,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:36:01,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670407954] [2023-08-29 21:36:01,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:01,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:36:01,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:36:01,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:36:01,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 212 [2023-08-29 21:36:01,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 92.875) internal successors, (743), 8 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:01,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 212 [2023-08-29 21:36:01,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:01,978 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-29 21:36:01,979 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 21:36:01,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 46 events. 16/46 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 7 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 45. Up to 34 conditions per place. [2023-08-29 21:36:01,979 INFO L137 encePairwiseOnDemand]: 208/212 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-29 21:36:01,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 94 flow [2023-08-29 21:36:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:36:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:36:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 387 transitions. [2023-08-29 21:36:01,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563679245283019 [2023-08-29 21:36:01,981 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 387 transitions. [2023-08-29 21:36:01,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 387 transitions. [2023-08-29 21:36:01,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:01,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 387 transitions. [2023-08-29 21:36:01,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,984 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,984 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 64 flow. Second operand 4 states and 387 transitions. [2023-08-29 21:36:01,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 94 flow [2023-08-29 21:36:01,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:01,985 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-29 21:36:01,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-29 21:36:01,985 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -14 predicate places. [2023-08-29 21:36:01,986 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-29 21:36:01,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 92.875) internal successors, (743), 8 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:01,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:36:01,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:36:01,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:36:01,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:36:01,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:36:01,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:36:01,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:36:02,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:02,193 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:36:02,195 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:36:02,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2023-08-29 21:36:02,206 INFO L130 PetriNetUnfolder]: 17/154 cut-off events. [2023-08-29 21:36:02,206 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:02,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 154 events. 17/154 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 377 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-29 21:36:02,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 236 flow [2023-08-29 21:36:02,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 109 transitions, 223 flow [2023-08-29 21:36:02,207 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:02,208 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 109 transitions, 223 flow [2023-08-29 21:36:02,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 109 transitions, 223 flow [2023-08-29 21:36:02,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 109 transitions, 223 flow [2023-08-29 21:36:02,216 INFO L130 PetriNetUnfolder]: 16/149 cut-off events. [2023-08-29 21:36:02,216 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:02,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 149 events. 16/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 362 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-29 21:36:02,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 2576 [2023-08-29 21:36:04,438 INFO L134 LiptonReduction]: Checked pairs total: 4520 [2023-08-29 21:36:04,438 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-29 21:36:04,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:36:04,441 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cb2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:04,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:36:04,445 INFO L130 PetriNetUnfolder]: 3/32 cut-off events. [2023-08-29 21:36:04,445 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:04,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:04,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:36:04,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:36:04,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:04,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1474015949, now seen corresponding path program 1 times [2023-08-29 21:36:04,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:04,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314335694] [2023-08-29 21:36:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:04,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:04,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:36:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:04,477 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:36:04,478 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:36:04,478 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:36:04,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:36:04,478 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:36:04,479 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:36:04,481 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:36:04,481 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:36:04,501 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:36:04,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:04,529 INFO L130 PetriNetUnfolder]: 31/253 cut-off events. [2023-08-29 21:36:04,529 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:04,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-29 21:36:04,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:04,532 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:04,533 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:04,533 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:04,533 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:04,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:04,551 INFO L130 PetriNetUnfolder]: 31/253 cut-off events. [2023-08-29 21:36:04,551 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:04,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-29 21:36:04,555 INFO L119 LiptonReduction]: Number of co-enabled transitions 7336 [2023-08-29 21:36:07,038 INFO L134 LiptonReduction]: Checked pairs total: 17520 [2023-08-29 21:36:07,038 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-29 21:36:07,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:07,041 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cb2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:07,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:07,043 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:36:07,043 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:07,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:07,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:07,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:07,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash 25988, now seen corresponding path program 1 times [2023-08-29 21:36:07,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:07,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900207231] [2023-08-29 21:36:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:07,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:07,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:07,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900207231] [2023-08-29 21:36:07,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900207231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:07,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:07,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270985616] [2023-08-29 21:36:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:07,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:07,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 251 [2023-08-29 21:36:07,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:07,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 251 [2023-08-29 21:36:07,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:07,367 INFO L130 PetriNetUnfolder]: 1980/3504 cut-off events. [2023-08-29 21:36:07,367 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-29 21:36:07,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6813 conditions, 3504 events. 1980/3504 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22388 event pairs, 952 based on Foata normal form. 769/3574 useless extension candidates. Maximal degree in co-relation 908. Up to 3241 conditions per place. [2023-08-29 21:36:07,380 INFO L137 encePairwiseOnDemand]: 232/251 looper letters, 41 selfloop transitions, 2 changer transitions 3/56 dead transitions. [2023-08-29 21:36:07,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 220 flow [2023-08-29 21:36:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-29 21:36:07,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564409030544488 [2023-08-29 21:36:07,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-29 21:36:07,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-29 21:36:07,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:07,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-29 21:36:07,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,385 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 419 transitions. [2023-08-29 21:36:07,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 220 flow [2023-08-29 21:36:07,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:07,388 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 116 flow [2023-08-29 21:36:07,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-29 21:36:07,391 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-29 21:36:07,391 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 116 flow [2023-08-29 21:36:07,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:07,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:07,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:36:07,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:07,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash 25986, now seen corresponding path program 1 times [2023-08-29 21:36:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:07,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369682947] [2023-08-29 21:36:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:07,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:07,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369682947] [2023-08-29 21:36:07,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369682947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:07,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:07,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586748060] [2023-08-29 21:36:07,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:07,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:07,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:07,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 251 [2023-08-29 21:36:07,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:07,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 251 [2023-08-29 21:36:07,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:07,679 INFO L130 PetriNetUnfolder]: 1500/2700 cut-off events. [2023-08-29 21:36:07,679 INFO L131 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2023-08-29 21:36:07,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5434 conditions, 2700 events. 1500/2700 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16366 event pairs, 1368 based on Foata normal form. 0/2353 useless extension candidates. Maximal degree in co-relation 5373. Up to 2265 conditions per place. [2023-08-29 21:36:07,688 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 45 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-29 21:36:07,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 234 flow [2023-08-29 21:36:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-29 21:36:07,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5179282868525896 [2023-08-29 21:36:07,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-29 21:36:07,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-29 21:36:07,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:07,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-29 21:36:07,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,694 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 116 flow. Second operand 3 states and 390 transitions. [2023-08-29 21:36:07,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 234 flow [2023-08-29 21:36:07,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:07,697 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 112 flow [2023-08-29 21:36:07,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-29 21:36:07,699 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-08-29 21:36:07,699 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 112 flow [2023-08-29 21:36:07,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:07,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:07,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:36:07,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:36:07,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:07,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1749637255, now seen corresponding path program 1 times [2023-08-29 21:36:07,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:07,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533558153] [2023-08-29 21:36:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:07,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:07,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:07,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533558153] [2023-08-29 21:36:07,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533558153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:07,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82704435] [2023-08-29 21:36:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:07,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:07,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:07,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:36:07,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:36:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:36:07,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:07,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:36:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:07,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:07,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82704435] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:07,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:07,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:36:07,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874267363] [2023-08-29 21:36:07,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:07,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:36:07,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:36:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:36:08,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 251 [2023-08-29 21:36:08,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:08,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:08,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 251 [2023-08-29 21:36:08,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:08,185 INFO L130 PetriNetUnfolder]: 286/547 cut-off events. [2023-08-29 21:36:08,185 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2023-08-29 21:36:08,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 547 events. 286/547 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2529 event pairs, 99 based on Foata normal form. 70/614 useless extension candidates. Maximal degree in co-relation 1129. Up to 346 conditions per place. [2023-08-29 21:36:08,186 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-29 21:36:08,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 201 flow [2023-08-29 21:36:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:36:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:36:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 611 transitions. [2023-08-29 21:36:08,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48685258964143424 [2023-08-29 21:36:08,188 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 611 transitions. [2023-08-29 21:36:08,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 611 transitions. [2023-08-29 21:36:08,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:08,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 611 transitions. [2023-08-29 21:36:08,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:08,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:08,191 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:08,191 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 112 flow. Second operand 5 states and 611 transitions. [2023-08-29 21:36:08,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 201 flow [2023-08-29 21:36:08,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:36:08,192 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-29 21:36:08,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-29 21:36:08,193 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -11 predicate places. [2023-08-29 21:36:08,193 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-29 21:36:08,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:08,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:36:08,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:36:08,194 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:36:08,194 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:36:08,194 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:36:08,194 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:36:08,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:36:08,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-29 21:36:08,412 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:36:08,412 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:36:08,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:08,426 INFO L130 PetriNetUnfolder]: 31/253 cut-off events. [2023-08-29 21:36:08,426 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:08,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-29 21:36:08,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:08,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:08,427 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:08,428 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:08,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:08,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2023-08-29 21:36:08,440 INFO L130 PetriNetUnfolder]: 31/253 cut-off events. [2023-08-29 21:36:08,440 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:08,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-29 21:36:08,443 INFO L119 LiptonReduction]: Number of co-enabled transitions 7336 [2023-08-29 21:36:10,579 INFO L134 LiptonReduction]: Checked pairs total: 16934 [2023-08-29 21:36:10,579 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-29 21:36:10,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:36:10,580 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cb2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:10,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:36:10,585 INFO L130 PetriNetUnfolder]: 10/66 cut-off events. [2023-08-29 21:36:10,586 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:36:10,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:10,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:36:10,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:36:10,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash -849819326, now seen corresponding path program 1 times [2023-08-29 21:36:10,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:10,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180528685] [2023-08-29 21:36:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:10,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:10,608 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:36:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:10,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:36:10,624 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:36:10,624 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:36:10,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:36:10,624 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:36:10,625 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:36:10,625 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:36:10,625 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:36:10,645 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:36:10,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:10,676 INFO L130 PetriNetUnfolder]: 50/393 cut-off events. [2023-08-29 21:36:10,677 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:10,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 393 events. 50/393 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-29 21:36:10,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:10,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:10,681 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:10,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:10,682 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:10,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:10,704 INFO L130 PetriNetUnfolder]: 50/393 cut-off events. [2023-08-29 21:36:10,704 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:10,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 393 events. 50/393 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-29 21:36:10,715 INFO L119 LiptonReduction]: Number of co-enabled transitions 13608 [2023-08-29 21:36:12,601 INFO L134 LiptonReduction]: Checked pairs total: 36238 [2023-08-29 21:36:12,601 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-29 21:36:12,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:12,618 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cb2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:12,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:12,619 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:36:12,619 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:12,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:12,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:12,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:12,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash 39952, now seen corresponding path program 1 times [2023-08-29 21:36:12,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:12,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105534172] [2023-08-29 21:36:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:12,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:12,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:12,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105534172] [2023-08-29 21:36:12,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105534172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:12,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:12,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:12,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546838212] [2023-08-29 21:36:12,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:12,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:12,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 296 [2023-08-29 21:36:12,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:12,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:12,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 296 [2023-08-29 21:36:12,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:15,581 INFO L130 PetriNetUnfolder]: 37303/55804 cut-off events. [2023-08-29 21:36:15,581 INFO L131 PetriNetUnfolder]: For 1071/1071 co-relation queries the response was YES. [2023-08-29 21:36:15,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109129 conditions, 55804 events. 37303/55804 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 1523. Compared 404389 event pairs, 24241 based on Foata normal form. 11879/59082 useless extension candidates. Maximal degree in co-relation 9031. Up to 52575 conditions per place. [2023-08-29 21:36:15,800 INFO L137 encePairwiseOnDemand]: 271/296 looper letters, 55 selfloop transitions, 2 changer transitions 3/71 dead transitions. [2023-08-29 21:36:15,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 290 flow [2023-08-29 21:36:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-08-29 21:36:15,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686936936936937 [2023-08-29 21:36:15,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-08-29 21:36:15,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-08-29 21:36:15,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:15,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-08-29 21:36:15,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:15,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:15,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:15,805 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 192 flow. Second operand 3 states and 505 transitions. [2023-08-29 21:36:15,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 290 flow [2023-08-29 21:36:15,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 71 transitions, 290 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:15,808 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 152 flow [2023-08-29 21:36:15,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-08-29 21:36:15,808 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-08-29 21:36:15,809 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 152 flow [2023-08-29 21:36:15,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:15,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:15,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:15,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:36:15,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:15,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:15,810 INFO L85 PathProgramCache]: Analyzing trace with hash 39950, now seen corresponding path program 1 times [2023-08-29 21:36:15,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:15,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656481531] [2023-08-29 21:36:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:15,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:15,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656481531] [2023-08-29 21:36:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656481531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:15,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:15,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:15,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387214931] [2023-08-29 21:36:15,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:15,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:15,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:15,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 296 [2023-08-29 21:36:15,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:15,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:15,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 296 [2023-08-29 21:36:15,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:18,001 INFO L130 PetriNetUnfolder]: 28311/42009 cut-off events. [2023-08-29 21:36:18,001 INFO L131 PetriNetUnfolder]: For 2589/2589 co-relation queries the response was YES. [2023-08-29 21:36:18,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85091 conditions, 42009 events. 28311/42009 cut-off events. For 2589/2589 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 291083 event pairs, 25801 based on Foata normal form. 0/37961 useless extension candidates. Maximal degree in co-relation 85019. Up to 36555 conditions per place. [2023-08-29 21:36:18,137 INFO L137 encePairwiseOnDemand]: 292/296 looper letters, 67 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-29 21:36:18,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 334 flow [2023-08-29 21:36:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-29 21:36:18,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382882882882883 [2023-08-29 21:36:18,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-29 21:36:18,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-29 21:36:18,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:18,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-29 21:36:18,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:18,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:18,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:18,158 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 152 flow. Second operand 3 states and 478 transitions. [2023-08-29 21:36:18,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 334 flow [2023-08-29 21:36:18,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:18,165 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 148 flow [2023-08-29 21:36:18,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-08-29 21:36:18,166 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2023-08-29 21:36:18,166 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 148 flow [2023-08-29 21:36:18,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:18,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:18,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:36:18,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:36:18,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:18,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1725619600, now seen corresponding path program 1 times [2023-08-29 21:36:18,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:18,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104635625] [2023-08-29 21:36:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:18,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:18,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:18,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104635625] [2023-08-29 21:36:18,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104635625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:18,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63133677] [2023-08-29 21:36:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:18,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:18,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:18,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:36:18,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:36:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:36:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:18,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:36:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:18,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:18,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63133677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:18,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:18,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:36:18,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403361703] [2023-08-29 21:36:18,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:18,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:36:18,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:36:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:36:18,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 296 [2023-08-29 21:36:18,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 148 flow. Second operand has 8 states, 8 states have (on average 136.875) internal successors, (1095), 8 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:18,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:18,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 296 [2023-08-29 21:36:18,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:18,938 INFO L130 PetriNetUnfolder]: 5560/8248 cut-off events. [2023-08-29 21:36:18,938 INFO L131 PetriNetUnfolder]: For 1296/1296 co-relation queries the response was YES. [2023-08-29 21:36:18,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17367 conditions, 8248 events. 5560/8248 cut-off events. For 1296/1296 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 47463 event pairs, 630 based on Foata normal form. 819/9048 useless extension candidates. Maximal degree in co-relation 17356. Up to 5346 conditions per place. [2023-08-29 21:36:18,947 INFO L137 encePairwiseOnDemand]: 292/296 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2023-08-29 21:36:18,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 376 flow [2023-08-29 21:36:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:36:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:36:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2023-08-29 21:36:18,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061936936936937 [2023-08-29 21:36:18,950 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2023-08-29 21:36:18,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2023-08-29 21:36:18,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:18,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2023-08-29 21:36:18,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:18,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:18,953 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 296.0) internal successors, (2072), 7 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:18,954 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 148 flow. Second operand 6 states and 899 transitions. [2023-08-29 21:36:18,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 376 flow [2023-08-29 21:36:18,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 93 transitions, 373 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:36:18,955 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-29 21:36:18,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-29 21:36:18,955 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -10 predicate places. [2023-08-29 21:36:18,956 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-29 21:36:18,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 136.875) internal successors, (1095), 8 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:18,956 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:36:18,956 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:36:18,956 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:36:18,956 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:36:18,957 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:36:18,957 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:36:18,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 21:36:19,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:19,162 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:36:19,162 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:36:19,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:19,182 INFO L130 PetriNetUnfolder]: 50/393 cut-off events. [2023-08-29 21:36:19,182 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:19,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 393 events. 50/393 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-29 21:36:19,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:19,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:19,185 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:19,185 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:19,185 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:19,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 174 transitions, 378 flow [2023-08-29 21:36:19,203 INFO L130 PetriNetUnfolder]: 50/393 cut-off events. [2023-08-29 21:36:19,203 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:19,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 393 events. 50/393 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-29 21:36:19,210 INFO L119 LiptonReduction]: Number of co-enabled transitions 13608 [2023-08-29 21:36:21,123 INFO L134 LiptonReduction]: Checked pairs total: 35758 [2023-08-29 21:36:21,124 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-29 21:36:21,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:36:21,126 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cb2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:21,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:36:21,132 INFO L130 PetriNetUnfolder]: 19/108 cut-off events. [2023-08-29 21:36:21,133 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:36:21,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:21,133 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:36:21,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:36:21,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:21,133 INFO L85 PathProgramCache]: Analyzing trace with hash 486255845, now seen corresponding path program 1 times [2023-08-29 21:36:21,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339484698] [2023-08-29 21:36:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:21,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:21,181 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:36:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:21,199 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:36:21,199 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:36:21,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:36:21,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:36:21,200 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:36:21,205 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:36:21,205 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:36:21,205 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:36:21,222 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:36:21,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 204 transitions, 452 flow [2023-08-29 21:36:21,261 INFO L130 PetriNetUnfolder]: 81/617 cut-off events. [2023-08-29 21:36:21,262 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:36:21,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 617 events. 81/617 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2493 event pairs, 6 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 413. Up to 32 conditions per place. [2023-08-29 21:36:21,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 204 transitions, 452 flow [2023-08-29 21:36:21,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 204 transitions, 452 flow [2023-08-29 21:36:21,268 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:21,268 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 204 transitions, 452 flow [2023-08-29 21:36:21,268 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 204 transitions, 452 flow [2023-08-29 21:36:21,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 204 transitions, 452 flow [2023-08-29 21:36:21,305 INFO L130 PetriNetUnfolder]: 81/617 cut-off events. [2023-08-29 21:36:21,305 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:36:21,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 617 events. 81/617 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2493 event pairs, 6 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 413. Up to 32 conditions per place. [2023-08-29 21:36:21,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 21616 [2023-08-29 21:36:23,618 INFO L134 LiptonReduction]: Checked pairs total: 59483 [2023-08-29 21:36:23,618 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-29 21:36:23,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:23,619 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cb2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:23,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:23,620 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:36:23,621 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:23,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:23,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:23,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:23,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:23,621 INFO L85 PathProgramCache]: Analyzing trace with hash 55900, now seen corresponding path program 1 times [2023-08-29 21:36:23,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:23,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367112679] [2023-08-29 21:36:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:23,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367112679] [2023-08-29 21:36:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367112679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:23,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:23,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922274010] [2023-08-29 21:36:23,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:23,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 344 [2023-08-29 21:36:23,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:23,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 344 [2023-08-29 21:36:23,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:50,753 INFO L130 PetriNetUnfolder]: 316706/439232 cut-off events. [2023-08-29 21:36:50,753 INFO L131 PetriNetUnfolder]: For 11952/11952 co-relation queries the response was YES. [2023-08-29 21:36:51,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860962 conditions, 439232 events. 316706/439232 cut-off events. For 11952/11952 co-relation queries the response was YES. Maximal size of possible extension queue 9828. Compared 3520016 event pairs, 257970 based on Foata normal form. 74961/460686 useless extension candidates. Maximal degree in co-relation 82457. Up to 415041 conditions per place. [2023-08-29 21:36:52,939 INFO L137 encePairwiseOnDemand]: 314/344 looper letters, 61 selfloop transitions, 2 changer transitions 2/82 dead transitions. [2023-08-29 21:36:52,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 82 transitions, 336 flow [2023-08-29 21:36:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2023-08-29 21:36:52,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562984496124031 [2023-08-29 21:36:52,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2023-08-29 21:36:52,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2023-08-29 21:36:52,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:52,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2023-08-29 21:36:52,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:52,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:52,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:52,944 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 240 flow. Second operand 3 states and 581 transitions. [2023-08-29 21:36:52,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 82 transitions, 336 flow [2023-08-29 21:36:52,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:52,947 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 190 flow [2023-08-29 21:36:52,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-08-29 21:36:52,948 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2023-08-29 21:36:52,948 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 190 flow [2023-08-29 21:36:52,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:52,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:52,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:52,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:36:52,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:52,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:52,949 INFO L85 PathProgramCache]: Analyzing trace with hash 55901, now seen corresponding path program 1 times [2023-08-29 21:36:52,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:52,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453185343] [2023-08-29 21:36:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:36:52,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:52,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453185343] [2023-08-29 21:36:52,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453185343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:52,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:52,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:52,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262142715] [2023-08-29 21:36:52,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:52,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:52,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:52,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:52,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:52,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 344 [2023-08-29 21:36:52,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:52,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:52,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 344 [2023-08-29 21:36:52,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:37:13,195 INFO L130 PetriNetUnfolder]: 253367/351284 cut-off events. [2023-08-29 21:37:13,196 INFO L131 PetriNetUnfolder]: For 21220/21220 co-relation queries the response was YES. [2023-08-29 21:37:13,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704817 conditions, 351284 events. 253367/351284 cut-off events. For 21220/21220 co-relation queries the response was YES. Maximal size of possible extension queue 7910. Compared 2758936 event pairs, 229706 based on Foata normal form. 0/323563 useless extension candidates. Maximal degree in co-relation 704749. Up to 301807 conditions per place. [2023-08-29 21:37:15,056 INFO L137 encePairwiseOnDemand]: 340/344 looper letters, 79 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-29 21:37:15,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 406 flow [2023-08-29 21:37:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:37:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:37:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-08-29 21:37:15,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2023-08-29 21:37:15,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-08-29 21:37:15,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-08-29 21:37:15,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:37:15,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-08-29 21:37:15,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:15,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:15,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:15,078 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 190 flow. Second operand 3 states and 556 transitions. [2023-08-29 21:37:15,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 406 flow [2023-08-29 21:37:15,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:37:15,128 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 186 flow [2023-08-29 21:37:15,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-08-29 21:37:15,129 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -1 predicate places. [2023-08-29 21:37:15,129 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 186 flow [2023-08-29 21:37:15,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:15,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:37:15,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:37:15,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:37:15,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:37:15,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:37:15,130 INFO L85 PathProgramCache]: Analyzing trace with hash 132510141, now seen corresponding path program 1 times [2023-08-29 21:37:15,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:37:15,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694615679] [2023-08-29 21:37:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:37:15,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:37:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:37:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:37:15,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:37:15,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694615679] [2023-08-29 21:37:15,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694615679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:37:15,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325381014] [2023-08-29 21:37:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:37:15,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:37:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:37:15,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:37:15,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:37:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:37:15,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:37:15,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:37:15,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:37:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:37:15,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:37:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:37:15,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325381014] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:37:15,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:37:15,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:37:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119515764] [2023-08-29 21:37:15,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:37:15,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:37:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:37:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:37:15,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:37:15,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 344 [2023-08-29 21:37:15,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 159.71428571428572) internal successors, (1118), 7 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:15,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:37:15,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 344 [2023-08-29 21:37:15,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:37:35,592 INFO L130 PetriNetUnfolder]: 257974/349094 cut-off events. [2023-08-29 21:37:35,592 INFO L131 PetriNetUnfolder]: For 18935/18935 co-relation queries the response was YES. [2023-08-29 21:37:36,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716524 conditions, 349094 events. 257974/349094 cut-off events. For 18935/18935 co-relation queries the response was YES. Maximal size of possible extension queue 7811. Compared 2602463 event pairs, 48061 based on Foata normal form. 8/331081 useless extension candidates. Maximal degree in co-relation 646528. Up to 276748 conditions per place. [2023-08-29 21:37:37,712 INFO L137 encePairwiseOnDemand]: 338/344 looper letters, 146 selfloop transitions, 7 changer transitions 1/171 dead transitions. [2023-08-29 21:37:37,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 171 transitions, 725 flow [2023-08-29 21:37:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:37:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:37:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1106 transitions. [2023-08-29 21:37:37,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358527131782945 [2023-08-29 21:37:37,715 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1106 transitions. [2023-08-29 21:37:37,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1106 transitions. [2023-08-29 21:37:37,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:37:37,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1106 transitions. [2023-08-29 21:37:37,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.33333333333334) internal successors, (1106), 6 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:37,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:37,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:37,720 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 186 flow. Second operand 6 states and 1106 transitions. [2023-08-29 21:37:37,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 171 transitions, 725 flow [2023-08-29 21:37:46,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 171 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:37:46,602 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 232 flow [2023-08-29 21:37:46,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2023-08-29 21:37:46,603 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 6 predicate places. [2023-08-29 21:37:46,603 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 232 flow [2023-08-29 21:37:46,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 159.71428571428572) internal successors, (1118), 7 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:46,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:37:46,604 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:37:46,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 21:37:46,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 21:37:46,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:37:46,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:37:46,808 INFO L85 PathProgramCache]: Analyzing trace with hash 714781450, now seen corresponding path program 1 times [2023-08-29 21:37:46,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:37:46,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660143322] [2023-08-29 21:37:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:37:46,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:37:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:37:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:37:46,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:37:46,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660143322] [2023-08-29 21:37:46,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660143322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:37:46,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:37:46,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:37:46,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516351737] [2023-08-29 21:37:46,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:37:46,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:37:46,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:37:46,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:37:46,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:37:46,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 344 [2023-08-29 21:37:46,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:46,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:37:46,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 344 [2023-08-29 21:37:46,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:13,383 INFO L130 PetriNetUnfolder]: 342947/467694 cut-off events. [2023-08-29 21:38:13,384 INFO L131 PetriNetUnfolder]: For 156643/156643 co-relation queries the response was YES. [2023-08-29 21:38:14,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000326 conditions, 467694 events. 342947/467694 cut-off events. For 156643/156643 co-relation queries the response was YES. Maximal size of possible extension queue 9376. Compared 3545535 event pairs, 170334 based on Foata normal form. 0/449072 useless extension candidates. Maximal degree in co-relation 550769. Up to 444567 conditions per place. [2023-08-29 21:38:16,029 INFO L137 encePairwiseOnDemand]: 338/344 looper letters, 85 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2023-08-29 21:38:16,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 104 transitions, 541 flow [2023-08-29 21:38:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-29 21:38:16,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2023-08-29 21:38:16,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-29 21:38:16,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-29 21:38:16,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:16,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-29 21:38:16,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:16,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:16,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:16,039 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 232 flow. Second operand 3 states and 552 transitions. [2023-08-29 21:38:16,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 104 transitions, 541 flow [2023-08-29 21:38:16,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 531 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:38:16,087 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 259 flow [2023-08-29 21:38:16,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2023-08-29 21:38:16,088 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 7 predicate places. [2023-08-29 21:38:16,088 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 259 flow [2023-08-29 21:38:16,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:16,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:16,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:38:16,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:38:16,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:16,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash -395702993, now seen corresponding path program 1 times [2023-08-29 21:38:16,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:16,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187012933] [2023-08-29 21:38:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:16,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:38:16,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:16,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187012933] [2023-08-29 21:38:16,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187012933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:16,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:16,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:38:16,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972140100] [2023-08-29 21:38:16,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:16,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:16,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:16,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 344 [2023-08-29 21:38:16,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:16,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:16,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 344 [2023-08-29 21:38:16,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:36,870 INFO L130 PetriNetUnfolder]: 249032/344206 cut-off events. [2023-08-29 21:38:36,870 INFO L131 PetriNetUnfolder]: For 139705/139709 co-relation queries the response was YES. [2023-08-29 21:38:37,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765271 conditions, 344206 events. 249032/344206 cut-off events. For 139705/139709 co-relation queries the response was YES. Maximal size of possible extension queue 7603. Compared 2689137 event pairs, 173680 based on Foata normal form. 5793/336542 useless extension candidates. Maximal degree in co-relation 470741. Up to 241630 conditions per place. [2023-08-29 21:38:39,126 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 96 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-08-29 21:38:39,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 558 flow [2023-08-29 21:38:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2023-08-29 21:38:39,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562015503875969 [2023-08-29 21:38:39,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2023-08-29 21:38:39,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2023-08-29 21:38:39,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:39,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2023-08-29 21:38:39,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:39,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:39,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:39,131 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 259 flow. Second operand 3 states and 574 transitions. [2023-08-29 21:38:39,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 558 flow [2023-08-29 21:38:39,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 116 transitions, 550 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:38:39,177 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 270 flow [2023-08-29 21:38:39,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2023-08-29 21:38:39,177 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2023-08-29 21:38:39,177 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 270 flow [2023-08-29 21:38:39,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:39,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:39,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:38:39,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:38:39,178 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:39,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash -395703065, now seen corresponding path program 1 times [2023-08-29 21:38:39,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:39,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995144406] [2023-08-29 21:38:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:39,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:38:39,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:39,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995144406] [2023-08-29 21:38:39,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995144406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:39,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:39,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:38:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765138534] [2023-08-29 21:38:39,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:39,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:38:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:38:39,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:38:39,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 344 [2023-08-29 21:38:39,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:39,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:39,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 344 [2023-08-29 21:38:39,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:00,306 INFO L130 PetriNetUnfolder]: 229318/318671 cut-off events. [2023-08-29 21:39:00,307 INFO L131 PetriNetUnfolder]: For 159538/159542 co-relation queries the response was YES. [2023-08-29 21:39:01,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725832 conditions, 318671 events. 229318/318671 cut-off events. For 159538/159542 co-relation queries the response was YES. Maximal size of possible extension queue 6957. Compared 2488571 event pairs, 166632 based on Foata normal form. 0/311614 useless extension candidates. Maximal degree in co-relation 482779. Up to 231227 conditions per place. [2023-08-29 21:39:02,232 INFO L137 encePairwiseOnDemand]: 339/344 looper letters, 120 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-08-29 21:39:02,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 144 transitions, 682 flow [2023-08-29 21:39:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:39:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:39:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 752 transitions. [2023-08-29 21:39:02,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2023-08-29 21:39:02,236 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 752 transitions. [2023-08-29 21:39:02,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 752 transitions. [2023-08-29 21:39:02,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:02,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 752 transitions. [2023-08-29 21:39:02,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:02,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:02,242 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:02,251 INFO L175 Difference]: Start difference. First operand has 86 places, 78 transitions, 270 flow. Second operand 4 states and 752 transitions. [2023-08-29 21:39:02,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 144 transitions, 682 flow [2023-08-29 21:39:03,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 144 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:39:03,132 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 284 flow [2023-08-29 21:39:03,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2023-08-29 21:39:03,133 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2023-08-29 21:39:03,133 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 284 flow [2023-08-29 21:39:03,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:03,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:03,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:03,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 21:39:03,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:39:03,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:03,134 INFO L85 PathProgramCache]: Analyzing trace with hash 20648122, now seen corresponding path program 1 times [2023-08-29 21:39:03,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:03,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556930891] [2023-08-29 21:39:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:03,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:03,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556930891] [2023-08-29 21:39:03,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556930891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:39:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305770616] [2023-08-29 21:39:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:03,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:39:03,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:39:03,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:39:03,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:39:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:03,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:39:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:39:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:03,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:39:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:03,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305770616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:39:03,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:39:03,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:39:03,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086392842] [2023-08-29 21:39:03,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:39:03,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:39:03,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:39:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:39:03,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 344 [2023-08-29 21:39:03,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 284 flow. Second operand has 9 states, 9 states have (on average 164.11111111111111) internal successors, (1477), 9 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:03,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:03,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 344 [2023-08-29 21:39:03,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:07,881 INFO L130 PetriNetUnfolder]: 53669/74508 cut-off events. [2023-08-29 21:39:07,881 INFO L131 PetriNetUnfolder]: For 92852/92852 co-relation queries the response was YES. [2023-08-29 21:39:08,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192814 conditions, 74508 events. 53669/74508 cut-off events. For 92852/92852 co-relation queries the response was YES. Maximal size of possible extension queue 2051. Compared 509689 event pairs, 5640 based on Foata normal form. 5753/79922 useless extension candidates. Maximal degree in co-relation 192800. Up to 46151 conditions per place. [2023-08-29 21:39:08,331 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 118 selfloop transitions, 5 changer transitions 0/140 dead transitions. [2023-08-29 21:39:08,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 140 transitions, 634 flow [2023-08-29 21:39:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:39:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:39:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1244 transitions. [2023-08-29 21:39:08,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166112956810631 [2023-08-29 21:39:08,349 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1244 transitions. [2023-08-29 21:39:08,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1244 transitions. [2023-08-29 21:39:08,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:08,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1244 transitions. [2023-08-29 21:39:08,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.71428571428572) internal successors, (1244), 7 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:08,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:08,356 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:08,370 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 284 flow. Second operand 7 states and 1244 transitions. [2023-08-29 21:39:08,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 140 transitions, 634 flow [2023-08-29 21:39:08,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 140 transitions, 621 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-29 21:39:08,388 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 193 flow [2023-08-29 21:39:08,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2023-08-29 21:39:08,388 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2023-08-29 21:39:08,388 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 193 flow [2023-08-29 21:39:08,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 164.11111111111111) internal successors, (1477), 9 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:08,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:08,389 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:08,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:39:08,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:39:08,594 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:39:08,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:08,594 INFO L85 PathProgramCache]: Analyzing trace with hash -627048166, now seen corresponding path program 1 times [2023-08-29 21:39:08,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:08,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357988554] [2023-08-29 21:39:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:08,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:08,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:08,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357988554] [2023-08-29 21:39:08,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357988554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:39:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594927601] [2023-08-29 21:39:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:08,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:39:08,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:39:08,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:39:08,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:39:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:08,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:39:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:39:08,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:39:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:08,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:39:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:09,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594927601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:39:09,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:39:09,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-29 21:39:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446998891] [2023-08-29 21:39:09,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:39:09,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 21:39:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 21:39:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-29 21:39:09,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 344 [2023-08-29 21:39:09,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 193 flow. Second operand has 17 states, 17 states have (on average 159.47058823529412) internal successors, (2711), 17 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:09,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:09,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 344 [2023-08-29 21:39:09,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:39:12,488 INFO L130 PetriNetUnfolder]: 35772/50417 cut-off events. [2023-08-29 21:39:12,489 INFO L131 PetriNetUnfolder]: For 55539/55539 co-relation queries the response was YES. [2023-08-29 21:39:12,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117001 conditions, 50417 events. 35772/50417 cut-off events. For 55539/55539 co-relation queries the response was YES. Maximal size of possible extension queue 1410. Compared 337949 event pairs, 1673 based on Foata normal form. 5157/55310 useless extension candidates. Maximal degree in co-relation 116988. Up to 23225 conditions per place. [2023-08-29 21:39:12,659 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 0 selfloop transitions, 0 changer transitions 139/139 dead transitions. [2023-08-29 21:39:12,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 139 transitions, 619 flow [2023-08-29 21:39:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:39:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:39:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1213 transitions. [2023-08-29 21:39:12,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037375415282392 [2023-08-29 21:39:12,662 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1213 transitions. [2023-08-29 21:39:12,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1213 transitions. [2023-08-29 21:39:12,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:39:12,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1213 transitions. [2023-08-29 21:39:12,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.28571428571428) internal successors, (1213), 7 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:12,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:12,667 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:12,667 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 193 flow. Second operand 7 states and 1213 transitions. [2023-08-29 21:39:12,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 139 transitions, 619 flow [2023-08-29 21:39:12,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 139 transitions, 602 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 21:39:12,678 INFO L231 Difference]: Finished difference. Result has 76 places, 0 transitions, 0 flow [2023-08-29 21:39:12,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=76, PETRI_TRANSITIONS=0} [2023-08-29 21:39:12,679 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -1 predicate places. [2023-08-29 21:39:12,679 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 0 transitions, 0 flow [2023-08-29 21:39:12,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 159.47058823529412) internal successors, (2711), 17 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:12,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:39:12,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:39:12,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:39:12,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:39:12,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:39:12,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:39:12,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-29 21:39:12,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:39:12,884 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:12,886 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:39:12,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 204 transitions, 452 flow [2023-08-29 21:39:12,921 INFO L130 PetriNetUnfolder]: 81/617 cut-off events. [2023-08-29 21:39:12,921 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:39:12,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 617 events. 81/617 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2493 event pairs, 6 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 413. Up to 32 conditions per place. [2023-08-29 21:39:12,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 204 transitions, 452 flow [2023-08-29 21:39:12,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 204 transitions, 452 flow [2023-08-29 21:39:12,925 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:39:12,926 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 204 transitions, 452 flow [2023-08-29 21:39:12,926 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 204 transitions, 452 flow [2023-08-29 21:39:12,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 204 transitions, 452 flow [2023-08-29 21:39:13,128 INFO L130 PetriNetUnfolder]: 81/617 cut-off events. [2023-08-29 21:39:13,129 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:39:13,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 617 events. 81/617 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2493 event pairs, 6 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 413. Up to 32 conditions per place. [2023-08-29 21:39:13,138 INFO L119 LiptonReduction]: Number of co-enabled transitions 21616 [2023-08-29 21:39:15,440 INFO L134 LiptonReduction]: Checked pairs total: 59483 [2023-08-29 21:39:15,441 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-29 21:39:15,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:39:15,442 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cb2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:39:15,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:39:15,456 INFO L130 PetriNetUnfolder]: 29/157 cut-off events. [2023-08-29 21:39:15,456 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:39:15,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:15,456 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:39:15,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:39:15,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash 342467813, now seen corresponding path program 1 times [2023-08-29 21:39:15,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:15,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220686768] [2023-08-29 21:39:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:15,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:39:15,487 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:39:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:39:15,509 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:39:15,509 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:39:15,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:39:15,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 21:39:15,510 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:39:15,512 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:39:15,512 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:39:15,512 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 21:39:15,531 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-29 21:39:15,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 528 flow [2023-08-29 21:39:15,612 INFO L130 PetriNetUnfolder]: 140/1013 cut-off events. [2023-08-29 21:39:15,612 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:39:15,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1013 events. 140/1013 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4992 event pairs, 23 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 662. Up to 80 conditions per place. [2023-08-29 21:39:15,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 234 transitions, 528 flow [2023-08-29 21:39:15,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 234 transitions, 528 flow [2023-08-29 21:39:15,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:39:15,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 234 transitions, 528 flow [2023-08-29 21:39:15,627 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 234 transitions, 528 flow [2023-08-29 21:39:15,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 528 flow [2023-08-29 21:39:15,702 INFO L130 PetriNetUnfolder]: 140/1013 cut-off events. [2023-08-29 21:39:15,702 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:39:15,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1013 events. 140/1013 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4992 event pairs, 23 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 662. Up to 80 conditions per place. [2023-08-29 21:39:15,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 31360 [2023-08-29 21:39:18,422 INFO L134 LiptonReduction]: Checked pairs total: 96934 [2023-08-29 21:39:18,423 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-29 21:39:18,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:39:18,424 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cb2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:39:18,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:39:18,425 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:39:18,425 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:39:18,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:39:18,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:39:18,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:39:18,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:39:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash 73799, now seen corresponding path program 1 times [2023-08-29 21:39:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:39:18,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393251346] [2023-08-29 21:39:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:39:18,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:39:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:39:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:39:18,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:39:18,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393251346] [2023-08-29 21:39:18,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393251346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:39:18,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:39:18,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:39:18,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887493904] [2023-08-29 21:39:18,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:39:18,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:39:18,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:39:18,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:39:18,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:39:18,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 389 [2023-08-29 21:39:18,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:39:18,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:39:18,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 389 [2023-08-29 21:39:18,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand